64624369 has 2 divisors, whose sum is σ = 64624370. Its totient is φ = 64624368.

The previous prime is 64624349. The next prime is 64624423. The reversal of 64624369 is 96342646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35247969 + 29376400 = 5937^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 64624369 - 2⁵ = 64624337 is a prime.

It is a super-2 number, since 2×64624369² = 8352618137296322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64624309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32312184 + 32312185.

It is an arithmetic number, because the mean of its divisors is an integer number (32312185).

Almost surely, 2^64624369 is an apocalyptic number.

It is an amenable number.

64624369 is a deficient number, since it is larger than the sum of its proper divisors (1).

64624369 is an equidigital number, since it uses as much as digits as its factorization.

64624369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The square root of 64624369 is about 8038.9283489779. The cubic root of 64624369 is about 401.2965615296.

The spelling of 64624369 in words is "sixty-four million, six hundred twenty-four thousand, three hundred sixty-nine".